Number of nX3 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A300316

Number of nX3 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =4a(2) =16a(3) =61a(4) =186a(5) =977a(6) =3875a(7) =15976a(8) =69695a(9) =291860a(10) =1231606a(11) =5238686a(12) =22132400a(13) =93661059a(14) =396772953a(15) =1679005708a(16) =7107319506a(17) =30089549251a(18) =127365200852a(19) =539154160924

External references